Concealed hinge



p 1930- .H. P. TEVONIAN l",754,341

GONCEALED HINGE Filed Jan. 25, 1928 INVENTOR l 1 ll 0 II Patented Apr. 15, 1930 mqor PUZANT TEvoNIAN, or BROOKLYN, NEW YORK concEALEn HINGE Application filed January 25, 1928. N'o. 249,416.

This invention relates to a concealed hinge, suitable for use, for example, on automobile doors where it is desirable that the hinge be entirely enclosed or concealed when the door is shut.

The invention provides a novel hinge structure of this type which is strong and durable and enables the door to swing truly about an imaginary pivot axis away from the hinge.

While a preferred form of the invention has been disclosed for the purpose of illustration, it shouldbe understood that various changes may be made in the structure without departing from the'spirit and scope of the invention as hereinafter set forth and claimed.

Fig. 1 is a diagrammatic layout giving the center lines passing through the pivot points.

Fig. 2 is a top plan of the hinge, closed. Fig. 3 is a right-side elevation. Fig. 4 is a section at 44, Fig. 3. a Fig. 5 is a top plan of the hinge in open position. I

Fig. 6 is a front elevation of Fig. 5. Referring to the diagram, Fig. -1, 3 is the actual pivot center of the hinge, this being an imaginary center about which the door actually pivots but remote from the hinge structure proper, the other lines and pivot points in this figure being identified by the- 39 same numerals as the physical parts of the structure, as presently described.

A hinge embodying in'physical form the above described principles is shown in Figs.

2 to 6. It comprises-one or more of what I' call for convenience, main linkages, arranged one above the other and spaced apart, and each consisting of main or side plates 20, and intermediate plates or links 21, one end of each of which is pivotally connected at 22 to a side plate, and the other ends of the intermediate links are pivotally connected together at 23. It is usually sufficient, for each hinge, to provide two of these main linkages, as best seen in Figs. 3 and 6.

Between the main linkages is another link system, called for convenience, a connectingor controlling linkage, consisting of substantially straight inner or cross-links 24. and outer, or connecting links 25. Each of the inner links 24 is integral and rigid, and has at its center a hub formation 26, through which passes a pivot pin 27, engagin sockets in the upper and lower interme iate plates or links 21, at central points thereof.

The inward ends of cross links 24 are pivota-lly connected together at 28.

The outward ends of links 24 are pivotally connected at 29 to inward ends of links 25.

The outward ends of links 25 are formed with hubs, through which pass pivot pins 30, engaging in sockets in the upper and lower side plates plates 20.

Side plates 20 are connected as indicated by screw-holes 35, to meeting edge-walls of a door and its frame-stile, and the respective door and frame members may be recessed or flanged to completely conceal the hinge when the door is closed.

I claim:

A hinge comprising a main linkage including side plates, intermediate plates, one end of each of which is pivotally connected to one of the side plates at corresponding ends thereof and the other ends are pivotally connected together, and a controlling linkage including cross links pivotally connected at their centers to centers of said intermediate plates, and connecting links pivotally connected at their outer ends with center points of said side plates, the other end of each connecting'link being pivotally connected to one end of one of said cross links, and the other ends of the cross linksbeing pivotally connected together.

- H. P. TEVONIAN. 

